漂流心得，一块板接二个LCD1602
2017-04-207799
AI 快速预览详细
该项目介绍了如何在一块Arduino板上连接两个LCD1602显示屏，一个用于显示DHT11传感器读取的温湿度数据，另一个用于显示超声波传感器测量的距离。硬件清单包括Arduino板、两个LCD1602显示屏、DHT11传感器和超声波传感器。最终效果是能够实时显示温湿度和距离。难度等级适中，适合初学者学习和实践。
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注意跳线 #include <dht11.h> #include <Wire.h> #include <LiquidCrystal_I2C.h> LiquidCrystal_I2C lcd(0x20,16,2); //设置LCD的地址为0x20，可以设置2行，每行16个字符 LiquidCrystal_I2C mylcd(0x27,16,2); dht11 DHT; #define DHT11_PIN 3 float dist; float checkdistance_4_7() { digitalWrite(4, LOW); delayMicroseconds(2); digitalWrite(4, HIGH); delayMicroseconds(10); digitalWrite(4, LOW); float distance = pulseIn(7, HIGH) / 58.00; delay(10); return distance; } void setup(){ dist = 0; pinMode(4, OUTPUT); pinMode(7, INPUT); lcd.init(); // LCD初始化设置 lcd.backlight(); // 打开LCD背光 mylcd.init(); // LCD初始化设置 mylcd.backlight(); // 打开LCD背光 } void loop(){ dist = checkdistance_4_7(); if (dist < 1000) { mylcd.clear(); mylcd.setCursor(0, 0); mylcd.print("Distance(cm):"); mylcd.setCursor(0, 1); mylcd.print(dist); delay(1000); } lcd.clear(); lcd.setCursor(0, 0); Serial.println("Type,\tstatus,\tHumidity(%),\tTemperature(C)"); lcd.print("Humidity(%): "); //LCD屏显示” Humidity(%):” lcd.setCursor(0, 1); //光标移到第2行，第一个字符 lcd.print("Temp(C): "); //LCD屏显示”Temp(C):” int chk; //chk用于存储DHT11传感器的数据 Serial.print("DHT11, \t"); //读取DHT11传感器的数据 chk = DHT.read(DHT11_PIN); switch (chk){ case DHTLIB_OK: Serial.print("OK,\t"); break; case DHTLIB_ERROR_CHECKSUM: Serial.print("Checksum error,\t"); break; case DHTLIB_ERROR_TIMEOUT: Serial.print("Time out error,\t"); break; default: Serial.print("Unknown error,\t"); break; } //串口显示温湿度值 Serial.print(DHT.humidity,1); Serial.print(",\t"); Serial.println(DHT.temperature,1); //LCD显示温湿度值 lcd.setCursor(12, 0); lcd.print(DHT.humidity,1); lcd.setCursor(12, 1); lcd.print(DHT.temperature,1); delay(1000); } |
